This Way Up for 16 July 2016 (Part 2)

The Hum is described as an 'an anomalous sound heard around the world', a low frequency noise documented by thousands of people since the 70's, including hundreds of reported cases here in NZ. Then noisy knees and how the crunchy sounds of your knee bending can be used for rehabilitation. And finally we head into the world of the obituary writer at the New York Times - I'm talking to documentarian Vanessa Gould about her new film Obit.